Hi
Am doing an analysis on a Bowl part where I am providing immovable
restraints at the Thread region and Pressure in the regions as
required. The problem which am facing is Cosmosworks is showing
high stresses at the interface/edge of restraint and free surface
which is not true.
The part has a thread relief and it is at the centre of this thread
relief where high stresses are suppose to generate. But in my case,
its showing high stresses at the edge between the thread and thread
relief. Based on the lab experiemnts also this result is weird.

So do you guys know any good way to simulate threads and to avoid
showing of high stresses at the restraint thread and the free
surface.

I do similar analysis and have had to disregard those stress
where the restraints are. I have tried using a split line to have
the threaded surface into split into 2 surfaces and apply the
restraints to the part of hte thread that is actually "locked" in.
it helps a little. The highest stresses are usually always seen on
the ID.